Flower, Weed
upright prairie coneflower, prairie coneflower, redspike Mexican hat
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
Truncate
Black
Striate
The pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
crown extends the full width of the acheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat..
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat. laterally compressed, producing a sharp margin on either side.
Not listed
Not included
Asteraceae
Ratibida columnifera (Nutt.) Woot. & Standl.
Lepachys columnifera (Nutt.) J.F. Macbr.
Lepachys columnaris (Pursh) Torr. & A. Gray
Ratibida columnaris (Pursh) D. Don
Ratibida columnaris (Pursh) D. Don var. pulcherrima (DC.) D. Don
Rudbeckia columnaris Pursh, non Sims
Rudbeckia columnifera Nutt.
